Transparent heat-shielding/heat-insulating member and production method thereof

Abstract

A transparent heat-shielding/heat-insulating member 10 according to the present invention includes a transparent substrate 11 and a functional layer 23 formed on the transparent substrate 11 . The functional layer 23 includes, from the transparent substrate 11 side, an infrared reflective layer 21 and a protective layer 22 in this order. The infrared reflective layer 21 includes, from the transparent substrate 11 side, at least a metal layer 13 and a metal suboxide layer 14 in which a metal is partially oxidized, in this order. The protective layer 22 has a total thickness of 200 to 980 nm and includes, from the infrared reflective layer 21 side, at least a high refractive index layer 17 and a low refractive index layer 18 in this order.

What is claimed is: 
     
         1 . A transparent heat-shielding/heat-insulating member comprising a transparent substrate and a functional layer formed on the transparent substrate,
 wherein the functional layer includes, from the transparent substrate side, an infrared reflective layer and a protective layer in this order,   the infrared reflective layer includes, from the transparent substrate side, at least a metal layer, and a metal suboxide layer in which a metal is partially oxidized, in this order,   the protective layer has a total thickness of 200 to 980 nm, and includes, from the infrared reflective layer side, at least a high refractive index layer and a low refractive index layer in this order.   
     
     
         2 . The transparent heat-shielding/heat-insulating member according to  claim 1 ,
 wherein the metal suboxide layer in which a metal is partially oxidized has a thickness of 1 to 8 nm.   
     
     
         3 . The transparent heat-shielding/heat-insulating member according to  claim 1 ,
 wherein the protective layer includes, from the infrared reflective layer side, a medium refractive index layer, a high refractive index layer and a low refractive index layer in this order.   
     
     
         4 . The transparent heat-shielding/heat-insulating member according to  claim 1 ,
 wherein the protective layer includes, from the infrared reflective layer side, an optical adjustment layer, a medium refractive index layer, a high refractive index layer and a low refractive index layer in this order,   the optical adjustment layer has a refractive index at a wavelength of 550 nm of 1.60 to 2.00 and a thickness of 30 to 80 nm,   the medium refractive index layer has a refractive index at a wavelength of 550 nm of 1.45 to 1.55 and a thickness of 40 to 200 nm,   the high refractive index layer has a refractive index at a wavelength of 550 nm of 1.65 to 1.95 and a thickness of 60 to 550 nm, and   the low refractive index layer has a refractive index at a wavelength of 550 nm of 1.30 to 1.45 and a thickness of 70 to 150 nm.   
     
     
         5 . The transparent heat-shielding/heat-insulating member according to  claim 1 ,
 wherein the metal suboxide layer in which a metal is partially oxidized includes a titanium component.   
     
     
         6 . The transparent heat-shielding/heat-insulating member according to  claim 1 ,
 wherein a layer of the protective layer in contact with the infrared reflective layer includes titanium oxide fine particles.   
     
     
         7 . The transparent heat-shielding/heat-insulating member according to  claim 1 ,
 wherein the metal layer of the infrared reflective layer includes silver and has a thickness of 3 to 20 nm.   
     
     
         8 . The transparent heat-shielding/heat-insulating member according to  claim 1 ,
 wherein a cholesteric liquid crystal polymer layer is further formed on a surface of the transparent substrate on which the infrared reflective layer is not formed.   
     
     
         9 . The transparent heat-shielding/heat-insulating member according to  claim 8 ,
 wherein the cholesteric liquid crystal polymer layer is formed by photopolymerization of a material containing a liquid crystal compound having a polymerizable functional group, a chiral agent having a polymerizable functional group and a multifunctional acrylate compound.   
     
     
         10 . The transparent heat-shielding/heat-insulating member according to  claim 1 ,
 wherein in a reflection spectrum measured according to JIS R3106-1998,   if a “virtual line a” parallel to wavelength axis passes through an average value of a maximum reflectance and a minimum reflectance of the reflection spectrum at a wavelength of 500 to 570 nm, and a point corresponding to a wavelength of 535 nm on the “virtual line a” is a point A;   a “virtual line b” parallel to wavelength axis passes through an average value of a maximum reflectance and a minimum reflectance of the reflection spectrum at a wavelength of 620 to 780 nm, and a point corresponding to a wavelength of 700 nm on the “virtual line b” is a point B; and   a straight line passing through the point A and the point B that is extended to a wavelength of 500 to 780 nm is a reference line AB,   when comparing a reflectance value of the reflection spectrum and a reflectance value of the reference line AB at a wavelength of 500 to 570 nm, if an absolute value of a difference in reflectance value between the reflection spectrum and the reference line AB at a wavelength where the difference in reflectance value between the reflection spectrum and the reference line AB is maximized is defined as a maximum variation difference Δ A, a value of the maximum variation difference Δ A expressed by percentage of reflectance is 7% or less, and   when comparing a reflectance value of the reflection spectrum and a reflectance value of the reference line AB at a wavelength of 620 to 780 nm, if an absolute value of a difference in reflectance value between the reflection spectrum and the reference line AB at a wavelength where the difference in reflectance value between the reflection spectrum and the reference line AB is maximized is defined as a maximum variation difference Δ B, a value of the maximum variation difference Δ B expressed by percentage of reflectance is 9% or less.   
     
     
         11 . The transparent heat-shielding/heat-insulating member according to  claim 1 ,
 wherein a normal emissivity based on JIS R3106-1998 is 0.22 or less on the functional layer side.   
     
     
         12 . The transparent heat-shielding/heat-insulating member according to  claim 1 ,
 wherein after a 1000-hour weather resistance test according to JIS A5759, separation of the protective layer is not observed in a cross cut adhesion test according to JIS D0202-1998.   
     
     
         13 . A method for producing the transparent heat-shielding/heat-insulating member according to  claim 1 , the method comprising:
 forming an infrared reflective layer on a transparent substrate by a dry coating method; and   forming a protective layer on the infrared reflective layer by a wet coating method.   
     
     
         14 . The method for producing the transparent heat-shielding/heat-insulating member according to  claim 13 ,
 wherein the dry coating method is a reactive spattering method.